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If when using HD diesel oil 15W-40 with either CI-4, CI-4 plus or CJ-4 in a SB and need to add a quart when on the road, what type of oil can be used. Must HD diesel oil be used or can any oil be used.
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Re: Oil Type
Ralph-----
Other oils are compatible. However, I would always try to use the same type of oil as is in the car (not necessarily the same brand, though). It's usually not that hard to find diesel-rated oils. If you're concerned, carry a quart or two with you.In Appreciation of John Hinckley -
Re: Oil Type
Every truck stop & Walmart in the USA has the diesel oil.Comment
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Re: Oil Type
I agree with Joe. You can use virtually any oil to top off - even non-detergent (SA) in virtually any SAE grade, but if you know your engine's rate of consumption and take a road trip where you might need to add, just take a bottle or two with you. I usually add a half quart when it gets down that much, and I keep a couple of quart bottles around that have a quarter or a half quart already measured out.
Other than that you usually get gouged when you have to buy oil on the road at a gas station rather than your local discount retailer.
Virtually all motor oils are compatible. It comes down to the quality of the base stock and the additive package.
DukeComment
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Re: Oil Type
Duke-----
Yes, one can COUNT on paying a PREMIUM PRICE for oil whenever one purchases it at a service station on the road. If one has an "oil burner", one DEFINITELY wants to carry a supply of oil with them.In Appreciation of John HinckleyComment
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Re: Oil Type
Thanks for all the responses. Fortunately my car does not usually need oil added between oil changes. But I got to thinking. If I took the car on a long road trip what would I do if it was down a quart and I was using the HD Diesel oil and I needed to add oil. Would I need to add diesel oil or would regular oil be an OK substitute.
Thanks to you responses I guess it really doesn't matter.Comment
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